How to Reintroduce Arable Crops after Growing Perennial Wild Plant Species Such as Common Tansy (Tanacetum vulgare L.) for Biogas Production

The cultivation of perennial wild plant mixtures (WPMs) is becoming increasingly important in Germany for providing sustainably produced bioenergy. However, energy cropping systems always raise the question how to reclaim land arable crops. This study examined this issue by looking at a former WPM area was returned an organic farm. From 2013 2018, harvested annually autumn. 2019 2020, it co-managed with surrounding as semi-intensive grassland under three-cut regime. then ploughed spring 2021 grow silage maize. Weeds were controlled mechanically once. Nevertheless, species grew vigorously, common tansy (Tanacetum vulgare L.) standing out total fresh matter share 29.0%. maize–WPM mixture achieved dry yield 15.5 ± 5.5 Mg ha−1, which notably but not significantly (p < 0.05) lower than that maize growing next (23.4 ha−1). After maize, winter wheat sown autumn and further regrowth observed 2022. Yield quality effects must therefore be given special consideration first crop following cultivation.